CN108695825A - The control device and method of overcurrent for detecting vehicle DC motor - Google Patents
The control device and method of overcurrent for detecting vehicle DC motor Download PDFInfo
- Publication number
- CN108695825A CN108695825A CN201711018472.XA CN201711018472A CN108695825A CN 108695825 A CN108695825 A CN 108695825A CN 201711018472 A CN201711018472 A CN 201711018472A CN 108695825 A CN108695825 A CN 108695825A
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- Prior art keywords
- motor
- overcurrent
- vehicle
- detecting
- control device
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
- H02P2205/01—Current loop, i.e. comparison of the motor current with a current reference
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The present invention provides a kind of control devices and method for detecting the overcurrent of vehicle DC motor.The control device may include:Microcomputer is configured to pulse width modulated signal conversion be the digital signal for controlling direct current generator;Half-bridge driver configures the switch of direct current generator in order to control;Pressure regulator is configured for answering electric power;And noise removing filter.The microcomputer is configured to measure the voltage of the input of the half-bridge driver;Difference between connection voltage during each pulsewidth modulation period and shutdown voltage is compared with predetermined threshold;When the difference is more than the predetermined threshold pre-determined number, stop the direct current generator.
Description
With cross reference to related applications
This application claims the priority of the South Korea patent application No.10-2017-0043819 submitted on April 4th, 2017 and
Equity, all the contents of the application are merged in this article by quoting.
Technical field
The present invention relates to the control devices and method of the overcurrent for detecting vehicle DC (DC) motor, if detected
Flowing has overcurrent in DC motors, then the control device and method can stop the operation of DC motors to protect system.
Background technology
Statement in this part only provides background information related to the present invention and can not constitute the prior art.
In general, pulsewidth modulation (PWM) method is a kind of pulse modulation method, and be related to according to the level of modulated signal come
The method for changing the width of pulse and being modulated.The width of pulse increases when signal amplitude is larger, and signal amplitude compared with
Hour reduces.However, there is no change for the position of pulse or amplitude.Pwm signal can control the rotating speed of DC motors, that is, electricity
Stream.The rotating speed of DC motors can be controlled using variable resistance.In this case, if the electricity of only about 50% battery
Power is controlled and is supplied to motor, then remaining about 50% electric power can be consumed as the thermal losses of resistance.Therefore, PWM
Control method is preferred.
Compared with existing linear control method, PWM control methods, more specifically, semibridge system control method is with relatively low
Power attenuation (tens watts) and higher efficiency, therefore the fuel efficiency of vehicle can be improved.For this reason, recent DC
The control method of motor is gradually changed to semibridge system control method.
In PWM controls, predetermined time T1 (when a switch is on) and predetermined time T2 (when a switch is off) are controlled
Duty ratio.Based on the voltage of external power supply come control time T1 in the range of 0 to 100%.
In this way, if the current cycle flowed in DC motors when changing, electric power is with variable percentage
It is supplied to motor, then 100% electric power can instantaneously be supplied to motor.However, since frequency is about 20kHz, a cycle is very
It is short, therefore the response speed of motor has certain limitation.
Due to being constant corresponding to the output of average T1, and only electronic switch repeatedly ON/OFF, it is possible to
Control the rotating speed of motor.Specifically, this can cause the thermal losses of semiconductor internal resistance, the heat without causing variable resistance
Loss.Correspondingly, the control efficiency of microcomputer becomes or more than 95%.
However, when controlling the electric current of motor, since DC motors use high current, so when short circuit or stalling occurs,
The overcurrent of reference value may be flowed to destroy system.In the worst case, the winding mistake of motor is caused due to overcurrent
Heat, so as to cause fire.
In the prior art, the DC electric machine controllers of vehicle configure as shown in Figure 1.PWM control modules packet shown in FIG. 1
It includes:Microcomputer 11, half-bridge 12, shunt resistance 17, difference amplifier 18 and pressure regulator 14;Microcomputer 11 is for will be from
The pwm signal that peripheral control unit receives is converted to the digital signal for controlling DC motors;Half-bridge 12 includes two field-effect crystalline substances
Body pipe (FET) is to control the switch of DC motors 10;Shunt resistance 17 is used to measure the magnitude of current of DC motors 10;Difference amplifier 18
For amplifying the magnitude of current;Pressure regulator 14, which is used to execute when mistake occurs for microcomputer 11, resets operation.
Be externally controlled device be received and converted to be input to by the pwm signal of the signal of Computed parameter it is miniature
Computer 11.Converted PWM input signals are converted to the digital signal for controlling DC motors 10 by microcomputer 11.
This digital signal is converted into the signal with voltage value and current value for driving half-bridge 12.A pair of of FET
Driving DC motors 10 in one direction.
Shunt resistance 17 is used to compare by using the magnitude of current flowed duty ratio and the output of input PWM in motor 10
The duty ratio of PWM.If the difference between input duty cycle and output duty cycle is more than predetermined threshold, microcomputer 11 can
It can go wrong or DC motors may stall.If DC motors 10 stall, microcomputer 11 detects stalling, and will account for
Empty ratio is set as 0%, to prevent from causing fire in DC motors 10.
However, in order to reduce the shunt resistance 17 used in PWM control modules the influence of the driving current of motor
Resistance value is very small, and should be using the resistance of the error rate with very little to reduce the error of current measurement value.In addition, i.e.
Make when resistance value very little, also usually flow 10 to 20 amperes of electric current, should correspondingly use several watts of resistive element.
Further, since the voltage for being applied to resistance is very small, so the voltage difference across resistance is small to tens mV.Accordingly
Ground, using can by voltage amplification to tens times or more difference amplifier 18 come by voltage amplification to can be by miniature calculating
The value that machine 11 detects.
However, the overcurrent since DC motors should be detected using difference amplifier and comparator, so differential amplification
The delay of device can depend on the variation of the frequency and circuit constant of comparator circuit.Therefore, circuit becomes complicated, and cost can
It can increase.
Invention content
The present invention provides the control devices and method of the overcurrent for detecting vehicle DC motors, if detected in DC
Flowing has overcurrent in motor, then the control device and method can stop the operation of DC motors to protect system.
The present invention also provides the control devices and method of the overcurrent for detecting vehicle DC motors, without using difference
In the case of amplifier and comparator, the control device and method can simplify circuit by detecting the overcurrent of DC motors
And reduce cost.
A kind of control device of overcurrent for detecting vehicle DC motors may include:Microcomputer is configured to
Pulsewidth modulation (PWM) signal is converted into the digital signal for controlling DC motors;Half-bridge driver configures DC in order to control
The switch of motor;Pressure regulator is configured for answering electric power;And noise removing filter.The microcomputer is configured to survey
Measure the voltage of the input of the half-bridge driver;By the connection voltage and shutdown voltage during each pulsewidth modulation period
Between difference be compared with predetermined threshold;When the number that the difference is more than the predetermined threshold is more than pre-determined number,
Stop the DC motors.
The half-bridge driver may include high side FET and downside FET.
Voltage between noise removing filter and the input unit of half-bridge driver can be measured as the half-bridge
The voltage of the input of formula driver.
The microcomputer can measure the input of half-bridge driver using internal modulus (AD) converter
Voltage.
The microcomputer can measure high side FET and connect the period and turn off the drain voltage in the period.
The counter of memory executes counting to pre-determined number.
When the difference between voltage is more than predetermined threshold, the counter of memory can increase by 1;When the difference between voltage
When value is less than predetermined threshold, the counter of memory can reduce 1.
The AD converter of the microcomputer can be in each of the connection period of high side FET and shutdown period middle click-through
Row measures.
The pulse width modulated signal conversion that the microcomputer is configurable to that device reception will be externally controlled is that number is believed
Number.
The predetermined threshold can be set based on the connection operating condition of high side FET.
The microcomputer is configurable to after stopping the DC motors, turns off the FET of half-bridge driver.
The pre-determined number can be 1000 times.
In another aspect of this invention, a kind of controlling party for the overcurrent detecting vehicle DC motors using half-bridge driver
Method may include:High side FET is measured to connect the period and turning off the drain voltage in the period;Measurement is when connecting period and shutdown
Difference in section between measured drain voltage;Difference between the drain voltage is compared with predetermined threshold;It is right
The number that the difference is more than the predetermined threshold executes counting;When the numerical value of counting is more than pre-determined number, stop the DC
Motor.
The counter of memory can execute counting.
When the difference is more than predetermined threshold, the counter of memory can be increased by 1 by the control method;When described
When difference is less than predetermined threshold, the counter of memory can be reduced 1 by the method.
The internal A/D converter of microcomputer can measure the drain voltage.
The control method may further include is set as described by the time of measuring of the AD converter of microcomputer
The each midpoint of high side FET connected the period and turn off the period.
The control method may further include the connection operating condition based on high side FET the predetermined threshold is arranged
Value.
The control method may further include after the DC motors for stopping vehicle, turn off half-bridge driver
FET。
The control method, which may further include, sets the pre-determined number to 1000 times.
By explanation provided herein, other application field will be apparent.It should be understood that this specification and specific
Example is intended merely for the purpose of explanation, and is not intended to limit the scope of the invention.
Description of the drawings
In order to which the present invention may be better understood, the various forms of the present invention is described with reference to the accompanying drawings, by example,
In attached drawing:
Fig. 1 is showing the schematic diagram of the motor control assembly of half-bridge type in the prior art;
Fig. 2 is showing the schematic diagram of the control device of the overcurrent for detecting vehicle DC motors;
Fig. 3 is showing the schematic diagram of the equivalent circuit when high side FET is connected in half-bridge driver shown in Fig. 2;
Fig. 4 is showing the schematic diagram of the equivalent circuit when high side FET is turned off in half-bridge driver shown in Fig. 2;
Fig. 5 is showing the flow chart of the control method of the overcurrent for detecting vehicle DC motors;
Fig. 6 is showing the wave of high side FET grid voltages and high side FET drain voltage under normal condition and stop state
The schematic diagram of shape.
Drawings described herein is only intended to illustration purpose, it is not intended that in any way come limit the present invention model
It encloses.
Specific implementation mode
Illustrate to be only exemplary in itself below, it is not intended that the limitation present invention, application or purposes.It should be understood that
, in all the appended drawings, corresponding reference numeral indicates identical or corresponding component and feature.
The control device packet of the overcurrent for detecting vehicle DC motors in certain forms of the present invention shown in Fig. 2
It includes:Microcomputer 110, half-bridge driver 120, pressure regulator 140 and noise removing filter 160;Microcomputer 110 is used
In the pwm signal for being externally controlled device reception is converted to digital signal for controlling DC motors;Half-bridge driver 120 is wrapped
High side FET and downside FET are included to control the switch of DC motors 100;Pressure regulator 140 is for supplying electric power.
Compared with controller in the prior art, in certain forms of the present invention, shunt resistance, motor 100 are eliminated
Negative (-) terminal and half-bridge driver 120 be attached directly to ground.Further, since the voltage across shunt resistance is not required to
It is to be amplified, so eliminating difference amplifier.
Instead of in the prior art be used for measure DC motors 100 the magnitude of current shunt resistance, microcomputer 110 utilize in
The voltage of the drain node of high side FET between two FET of the AD converter in portion to measure composition half-bridge driver 120.
That is, voltage measurement point is located at the output unit and half-bridge driver 120 of noise removing filter 160
Between input unit.The control method of the control device of the overcurrent for detecting DC motors will be described to be utilized with reference to Fig. 5.
First, if micro-machine in the car is utilized in user, motor 100 can be driven.At this point, counter becomes
Amount is in internal storage using 0 as initial value (S101).
Hereafter, within the period for directly being connected to motor 100 for the high side FET of induced current, pass through microcomputer
110 AD converter measures the drain voltage (S102) of high side FET.Within the period of FET shutdowns, drain electrode is measured again
Voltage (S103).
Fig. 3 shows the equivalent circuit when the high side FET in half-bridge driver shown in Fig. 2 is connected.Voltage monitoring
The voltage of point should be equal to the voltage of battery.However, if the magnitude of current is very big, voltage can be because in internal resistance R and filter
Including inductor inductance component L and slightly decline.Correspondingly, it is connected with to motor in the high side FET of half-bridge driver
It is defined as following equation for the voltage value in the period of induced current.
Here, when motor stalls or when generating overcurrent, since the magnitude of current i flowed in motor is very big, electricity
Press the voltage value Vm of monitoring point lower than the voltage value under normal condition.
Fig. 4 is showing the signal of the equivalent circuit when the high side FET shutdowns in half-bridge driver shown in Fig. 2
Figure.
Here, downside FET is connected, so that the energy of storage within the engine is flowed back by downside FET.
Due to the voltage of the energy and battery that are stored in inductance L, the voltage of voltage monitoring point is defined as following equalities.
According to above-mentioned two equation, the voltage of the voltage of voltage monitoring point and stop state shown in fig. 6 under normal condition
It is different.
It is measured when high side FET is turned on and off according to the magnitude of current flowed in motor in a PWM period
Drain voltage is different.Correspondingly, by the difference and predetermined threshold turned on and off between voltage measured by each period
It is compared (S105).When difference is more than threshold value, the counter of memory increases by 1 (S107), otherwise, the counter of memory
Reduce by 1 (S106).
If measured value is continuously more than the scheduled number of threshold value (for example, 1000 times) (S108), can determine
Electric current flowing.It can be corrected to determine overcurrent flow since motor is made an uproar by being based on progress pre-determined number result of the comparison
Erroneous measurements caused by sound.
Should predetermined threshold be set based on the duty cycle of the high side FET when measuring.Due to flowing through the magnitude of current root of FET
Change according to duty ratio, so duty cycle when current measurement should be checked, and should be arranged and be suitable for each work
The threshold value of condition, because of the stalling current when normal current of high duty ratio may look like low duty ratio.Correspondingly, it is contemplated that
The resistance component value of the performance of used motor and used filter, it should be determined that go out the threshold value suitable for duty ratio.
Even if can be linear between the drain and source according to being charged and discharged if when voltage is applied to the grid of FET
Ground forms raceway groove.Therefore, in the ON/OFF period, electric current linearly increases and decreases, and in the voltage linear of drain electrode measurement
Variation.
Correspondingly, in order to reduce the difference generated due to voltage measurement time, the measurement sampling time of AD converter sets
It is set to the midpoint of ON/OFF period, to select median.
In case of overcurrent or stalling, then the driving of engine stops, and FET is turned off (S109).
In certain forms of the present invention, the shunt resistance and differential amplification used in conventional control device can be removed
Device, to reduce cost.
In the other forms of the present invention, even if under the initial driving state of DC motors, can also relatively accurately it examine
The lock-out state of motor is measured, and pressure drop will not be occurred between DC motors and ground by shunt resistance.Correspondingly, may be used
To inhibit electromagnetic noise.
Further, since the quantity of element is reduced, so the size of controller can also be improved with smaller, reliability.
The description of this invention is merely exemplary in nature, and therefore, is intended to fall within without departing from the variant of essence of the invention
Within the scope of the present invention.Such variant has been not to be regarded as a departure from the spirit and scope of the present invention.
Claims (20)
1. a kind of control device for detecting the overcurrent of vehicle DC motor, the control device include:
Microcomputer is configured to pulse width modulated signal conversion be the digital signal for controlling direct current generator;
Half-bridge driver configures the switch of direct current generator in order to control;
Pressure regulator is configured for answering electric power;
Noise removing filter,
Wherein, the microcomputer is further configured to:
Measure the voltage of the input of the half-bridge driver;
Difference between connection voltage during each pulsewidth modulation period and shutdown voltage is compared with predetermined threshold;
When the number that the difference is more than the predetermined threshold is more than pre-determined number, stop the direct current generator.
2. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein the half-bridge
Formula driver includes high side field-effect transistor and downside field-effect transistor.
3. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein noise remove
Voltage between filter and the input unit of half-bridge driver is measured as the electricity of the input of the half-bridge driver
Pressure.
4. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein described miniature
Computer measures voltage using internal simulation digital quantizer.
5. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein described miniature
Computer measurement high side field-effect transistor is connecting the period and is turning off the drain voltage in the period.
6. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein memory
Counter executes counting to the pre-determined number.
7. the control device according to claim 6 for detecting the overcurrent of vehicle DC motor, wherein
When the difference is more than predetermined threshold, the counter of memory increases by 1;
When the difference is less than predetermined threshold, the counter of memory reduces 1.
8. the control device according to claim 4 for detecting the overcurrent of vehicle DC motor, wherein described miniature
The analog-digital converter of computer is carried out in each midpoint of high side field-effect transistor connected the period and turn off the period
It measures.
9. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein described miniature
It is digital signal that allocation of computer, which is by the pulse width modulated signal conversion of device reception is externally controlled,.
10. the control device according to claim 2 for detecting the overcurrent of vehicle DC motor, wherein described pre-
Threshold value is determined based on the connection operating condition of high side field-effect transistor to be configured.
11. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein described micro-
Type allocation of computer is to turn off the field-effect transistor of the half-bridge driver after stopping direct current generator.
12. the control device according to claim 1 for detecting the overcurrent of vehicle DC motor, wherein described pre-
It is 1000 times to determine number.
13. a kind of control method for the overcurrent detecting vehicle DC motor using half-bridge driver, the control method packet
It includes:
High side field-effect transistor is measured to connect the period and turning off the drain voltage in the period;
Measurement is connecting the period and is turning off the difference between drain voltage measured in the period;
Difference between the drain voltage is compared with predetermined threshold;
The number for being more than the predetermined threshold to the difference executes counting;
When the numerical value of counting is more than pre-determined number, stop the direct current generator.
14. the controlling party of the overcurrent according to claim 13 for detecting vehicle DC motor using half-bridge driver
Method, wherein the counter of memory executes counting.
15. the controlling party of the overcurrent according to claim 14 for detecting vehicle DC motor using half-bridge driver
Method, wherein
When the difference is more than predetermined threshold, the counter of memory is increased by 1;
When the difference is less than predetermined threshold, the counter of memory is reduced 1.
16. the controlling party of the overcurrent according to claim 13 for detecting vehicle DC motor using half-bridge driver
Method, wherein the internal simulation digital quantizer of microcomputer measures the drain voltage.
17. the controlling party of the overcurrent according to claim 16 for detecting vehicle DC motor using half-bridge driver
Method further comprises:
When setting the time of measuring of the analog-digital converter of microcomputer to the connection of the high side field-effect transistor
Each midpoint of section and shutdown period.
18. the controlling party of the overcurrent according to claim 13 for detecting vehicle DC motor using half-bridge driver
Method further comprises:
The predetermined threshold is set based on the connection operating condition of high side field-effect transistor.
19. the controlling party of the overcurrent according to claim 13 for detecting vehicle DC motor using half-bridge driver
Method further comprises:
After stopping the direct current generator, the field-effect transistor of half-bridge driver is turned off.
20. the controlling party of the overcurrent according to claim 13 for detecting vehicle DC motor using half-bridge driver
Method further comprises:
It sets the pre-determined number to 1000 times.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2017-0043819 | 2017-04-04 | ||
| KR1020170043819A KR102295580B1 (en) | 2017-04-04 | 2017-04-04 | Controlling apparatus and method for senscing ovecurrent of dc motor for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108695825A true CN108695825A (en) | 2018-10-23 |
| CN108695825B CN108695825B (en) | 2021-07-06 |
Family
ID=63670022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711018472.XA Active CN108695825B (en) | 2017-04-04 | 2017-10-27 | Control apparatus and method for detecting overcurrent of vehicle DC motor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10333452B2 (en) |
| KR (1) | KR102295580B1 (en) |
| CN (1) | CN108695825B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7126128B2 (en) * | 2019-01-23 | 2022-08-26 | パナソニックＩｐマネジメント株式会社 | Actuator drive |
| KR102228811B1 (en) | 2019-07-31 | 2021-03-19 | (주)모토닉 | Motor controller device capable of overcurrent protection for vihicles |
| CN113410819B (en) * | 2021-06-12 | 2022-06-07 | 四川虹美智能科技有限公司 | Motor locked-rotor protection control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102295580B1 (en) | 2021-08-30 |
| US10333452B2 (en) | 2019-06-25 |
| CN108695825B (en) | 2021-07-06 |
| KR20180112569A (en) | 2018-10-12 |
| US20180287547A1 (en) | 2018-10-04 |
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